Esra Mete Güneyisi

• PhD
• Professor at Gaziantep University

Existing steel frames not complying with modern seismic codes are often vulnerable to earthquakes due to inadequate seismic detailing. These types of framed structures typically feature semi-rigid and partial strength column-base connections; the behaviour of such connections may significantly affect their seismic performance. However, current code...

Son yıllarda hem yüksek mukavemeti hem de sıcak veya soğuk haddelenmiş olarak bulunması sebebiyle, eliptik profillerin kullanımına yönelik ilgi artmaktadır. Eliptik kesitler içsel estetik özelliklerinin yanı sıra küçük ve büyük eksen özelliklerine sahip olmaları ile avantaj sağlamaktadırlar. Sunulan çalışmada esnek hesaplama yöntemlerinden gen eksp...

Existing steel frames not complying with modern seismic codes are often vulnerable to earthquakes due to inadequate seismic detailing. These types of framed structures typically feature semi-rigid and partial strength column-base connections; the behaviour of such connections may significantly affect their seismic performance. However, current code...

As a sustainable solution, employing recycled tire rubber aggregates in the production of concrete is of considerable interest. However, the applicability of rubberized concretes in construction is restricted due to their relatively low mechanical performance. Using rubberized concrete as a filling material in a steel tube provides a suitable solut...

In this study, it is aimed to investigate the seismic behavior of the reinforced concrete (RC) frames with and without infill walls having different thickness and arrangement. To this, 3, 4, 5, 6, and 7 story RC frames consisting of 4 and 5 bays were studied. Infill walls were introduced into the frame models by considering four different arrangeme...

This study aims to improve the ductility of high-strength SCC by adding hook-ended steel fibers and to analyze the effectiveness of this improvement using load-displacement responses and fracture parameters. Another objective of this study was to investigate the impact of steel fiber addition on the bond strength between the deformed steel bars and...

A damper is a significant tool that can enhance a building’s seismic performance. When these dampers are integrated into a structure, they help to reduce seismic forces such as absolute acceleration, displacement, velocity, and base shear. By simulating earthquake scenarios with and without tuned mass dampers (TMDs), it has been demonstrated that t...

Nowadays, building activities are expanding quickly, and the requirements in the design and construction sectors are developing. Devoted to these requirements, programs based on building information modeling (BIM) are employed to create digital representations of the physical and functional characteristics of spaces and to manage project processes....

To satisfy the criteria of sustainability in the design of the structures, the proper choice of structural material is required. As a construction material, concrete is one of the most efficient and widely used. Crack formation inherent in concrete is an important factor that concrete suffers from throughout its service life. Most of the cracks for...

In recent years, in the light of technological developments, the utilization of composite members that enable the use of superior properties of concrete and steel together in earthquake-resistant building design has become widespread. In this study, 5-, 8-, 10-, 13- and 15-story composite moment-resisting framed buildings were designed using compos...

Recent earthquakes have enforced the engineering community to design seismically more efficient buildings through the energy dissipation systems. For this purpose, this paper investigates the seismic behavior of a high-rise building with a series of base isolation systems. Firstly, a 20-storey steel frame is selected as a fixed-base building, and t...

Beton dolgulu çelik tüp (BDÇT) kolonlarda, çelik betonu sararak basınç dayanımını arttırırken beton çeliğin yerel burkulmasını geciktirir. Bu çalışma ile BDÇT kolonların yangın direncini etkileyen faktörleri kapsayan çalışmalar ile ilgili son gelişmeleri derleyip literatüre kazandırmak amaçlanmıştır. Dolgu türlerine göre yüksek yangın direnci sıras...

The basic aim of the study herein is to experimentally determine and evaluate the influences of nano-SiO2 and metakaolin incorporation on the rheological and workability characteristics as well as mechanical properties of fibrous self-compacting concretes (SCCs). For that purpose, two SCC series were designed at a constant total binder content of 5...

To mitigate damage in structures and to minimize the loss of life and property by an earthquake, the structures must be designed and built for resisting earthquake-generated agitations. For this, modern structural seismic protection strategies that can be divided into four main groups as seismic isolation, passive energy dissipation, semiactive and...

In this study, the nonlinear analysis and seismic appraisal of composite frames having concrete filled steel tube columns (CFSTs) were investigated. The case study composite frames were made of the square columns surrounded by steel tube outside and infilled with concrete, and also steel I beams. These frames were taken as 4, 6 and 8 stories with t...

Thermal bridging through cold-formed steel (CFS) channels can be substantially reduced by introducing staggered slots in the channels’ webs. The perforation size and pattern significantly affect the elastic shear buckling and ultimate loads of the channels in shear, which must be considered in the design. This paper proposes new models for accurate...

Reinforced concrete-filled steel tubular (R-CFST) columns are a relatively new member of the CFST family. They have been developed with the purpose of reducing the local buckling of steel tubes and enhancing both the load-carrying capacity and ductility of conventional CFST by configuring reinforcing bars in the concrete core. The study herein aims...

The study herein aims to evaluate the effectiveness of experimental parameters such as steel tube thickness and yield strength, column diameter and length, and concrete compressive strength on the axial compressive strength of concrete-filled steel tube (CFST) columns. For that purpose, a wide-range and up-to-date data repository, consisting of 551...

Recently, the base isolation system (BIS) has been adopted as mature structural protective system which dissipates the most part of the input energy emerged during any type of seismic excitation. However, BIS can induce large displacement because of having easily movement tendency of the bearing. Therefore, this study proposes a set of BIS incorpor...

This paper aims to use the artificial intelligence approach to develop a new model for predicting the ultimate axial strength of the circular concrete-filled steel tubular (CFST) stub columns. For this, the results of 314 experimentally tested circular CFST stub columns were employed in the generation of the design model. Since the influence of the...

Concrete-filled steel tube (CFST) members have high strength, stiffness, and ductility properties, which makes them favorable in structural applications. This study purposes to create a finite element analysis-based model for designing the peak strength of axially loaded CFSTcircular columns. To this aim, 314 test specimens presented in the previou...

This study aims to assess the effect of nonlinear modeling approaches used for frame elements while appraising the seismic performance of the composite moment resisting frame (CMRF) buildings. To this, the accuracy and efficiency of two representative numerical models (namely, inelastic force-based frame element-distributed plasticity (DP) and inel...

The present study mainly aims to propose design models for the prediction of the peak strength of the concrete-filled steel tubular (CFST) elliptical columns subjected to eccentric compressive loading. At that point, the study has gain importance since the design of specifically such elliptical columns is not covered by current design codes. For ex...

In this study, the seismic performance of buildings with shear wall and steel bracing were evaluated. To this, a nine-storey reinforced concrete (RC) building having a square plan with five bays in both directions and identical story height was considered. The building consists of typical beam-column frames. RC shear walls and concentric steel brac...

Progressive collapse refers to the spread of primary local damages within the structure. Following such damages due to removing one or more load-bearing columns, the failure spreads in a chain and causes structural failure. This study represents a report investigating the influence of various retrofitting methods on the progressive collapse resista...

Concrete filled double-skin steel tubular (CFDST) column comprises two inner and outer steel tubes with infill concrete between tubes. CFDST columns are used in many structural systems such as offshore structures and high rise buildings. The aim of this research is to examine the performance of composite frames composed of CFDST columns and steel b...

Kompozit yapı elemanlarının inşaat mühendisliği uygulamalarındaki kullanımları yaygınlaşmaktadır. Kompozit kirişler, döşemeler, çerçeveler, sandviç çift cidarlı paneller, içi beton dolu borular, içi beton dolu çift cidarlı borular gibi kompozit yapı türleri vardır. Bu kompozit yapı elemanlarının mekanik davranışlarının anlaşılması ve çözümlenebilme...

Recently, many buildings have originally been designed as base-isolated to mitigate the structural vibration. However, buildings with base isolation systems can undergo displacement/amplification demand due to the inherent nonlinear behaviour of the base isolators, especially in earthquake-prone regions. Hence, in some cases it could be necessary t...

The main objective of this study is to optimize and model the ultimate strength of axially loaded concrete-filled double skin steel tubular (CFDST) composite columns having a circular hollow section. By performing the multi-objective optimization analysis through the response surface methodology (RSM), an ultimate strength-based optimal design solu...

In this study, the use of high damping rubber bearing (HDRB) with various design properties in mitigating the seismic effects for steel buildings was investigated. For this, a generalized demand on the analytical model of HDRB was introduced and eighteen different models of HDRB were examined comparatively. These models were created by considering...

The peak strength of reinforced concrete (RC) columns plays an important role in the appraisal of inelastic seismic performance. It depends on various parameters related to the geometry, reinforcement detail, material property, confinement effect, and loading condition. In applications, it is usually a prior condition to classify the failure modes...

In this study, the seismic behavior factor of steel–concrete composite buildings was examined. For this purpose, 5-, 10-, 15- and 20-story composite moment-resisting frame (CMRF) buildings having concrete-filled steel tube columns and composite beams were designed at medium ductility (DCM) and high ductility (DCH) levels as per the regulations of E...

The elliptical hollow section has been recently included in the family of the structural steel hollow sections. This type of steel section is also used in the production of concrete-filled steel tubular (CFST) members. For the elliptical CFST compression members, there is no specific design formulation in the current provisions, except the code cal...

In this study, the structural response of concrete-filled single and double skin steel tubular (CFST and CFDST) composite tapered columns was investigated through the finite element method (FEM). In the development of the FEM model, the concentric axial loading condition and circular section were adopted. Experimental results available in the liter...

This study addresses an alternative use of viscous dampers (VDs) associated with buckling restrained braces (BRBs) as innovative seismic protection devices. For this purpose, 4-, 8- and 12-story steel bare frames were designed with 6.5 m equal span length and 4 m story height. Thereafter, they were seismically improved by mounting the VDs and BRBs...

Beam-column joints without transverse reinforcement can be considered as a weak link in reinforced concrete (RC) moment-resisting framed structural systems, particularly when subjected to seismic lateral loads. It is essential to fully understand the shear behavior of RC beam-column joints to avoid significant damage and eventual failure of RC stru...

Recently, many researchers have shown a great interest in single skin concrete-filled steel tubular (CFST) columns with circular and rectangular sections as well as elliptical sections that contain the performance of both sections. On the other hand, elliptical concrete-filled double skin steel tubular (CFDST) columns are a new member of the CFDST...

In this study, the use of high damping rubber bearing (HDRB) with various design properties in mitigating the seismic effects for steel buildings was investigated. For this, a generalized demand on the analytical model of HDRB was introduced and eighteen different models of HDRB were examined comparatively. These models were created by considering...

Base isolations are acknowledged as an effective seismic protective system for structural systems of buildings. This study investigates the effectiveness of lead rubber bearing (LRB) on the nonlinear response of the steel moment resisting frames subjected to real ground motions. To this aim, 12-storey regular and irregular steel frames in elevation...

This study addresses the nonlinear seismic responses of ordinary moment frame building upgraded with a series of passive protective systems. To this, friction damper (FD) as an energy dissipation device and lead rubber bearing (LRB), friction pendulum bearing (FPB), and high damping rubber bearing (HDRB) as base isolators were considered. The effec...

This study aimed to evaluate the effect of using steel plate shear walls (SPSWs) on the earthquake response of reinforced concrete (RC) moment resisting frames. For this, two types of RC frames, namely, ductile and nominally ductile RC frames were used. Each frame structure had five storeys and three-bays. The first storey height was 4 m while the...

In this study, the seismic behavior of regular and irregular composite moment resisting frame (CMRF) buildings was investigated. To this aim, 5, 8, 10, 13 and 15-story CMRFs having concrete filled steel tube columns and composite beams were designed at high ductility level and their performances were evaluated comparatively. The case study CMRF str...

In this study, the seismic behavior of steel framed buildings under the effect of near-field with pulse (NF-P), near-field without pulse (NF-NP), and far-field (FF) ground motions was evaluated in a comparative manner. For this, 8 and 12 story steel moment-resisting frames (SMRFs) having four equal bays and identical story height were taken into ac...

The study aimed to simulate the behavior of the concrete-filled double skin steel tubular (CFDST) composite columns having a circular hollow section using the finite element method (FEM). To indicate the accuracy and the reliability of the model, the proposed FEM model was verified by the experimental test results available in the literature. Moreo...

Composite columns such as concrete-filled steel tube (CFST) were adopted in many building constructions in recent years because of carrying high loading with the ability to resist buckling and small cross-sectional area. The high behavior of the CFST columns is due to the interaction between steel and concrete which called the composite action. Thi...

This study investigates the influence of the friction pendulum bearing (FPB) isolator characteristics on the nonlinear response of the buildings under various seismic excitations. To represent a wide range of assessment, 3, 6, and 9-storey steel framed buildings with twenty seven different isolation models of FPB were studied by identifying the loc...

The design of composite members consisting of a tubular column and in-filled conventional concrete has been available and well-defined in the provisions. However, for steel tube members filled with recycled aggregate concrete, there aren't any other special requirements in the current provisions. In this study, the experimental test results are use...

Fiber reinforced polymer (FRP) jackets have been recently used for strengthening purpose of concrete filled steel tube (CFST) composite columns and also for the suppression of outward local buckling that CFST columns may suffer. This study intends to investigate the axial compression capacity of circular CFST columns transversely strengthened by FR...

This study aims at proposing a new model for evaluating the ultimate axial strength of concrete-filled double skin steel tubular (CFDST) composite columns. For this, a total of 103 experimental data regarding the ultimate strength of CFDST columns under axial loading were collected from the previous studies in the literature. All CFDST columns cons...

The present study evaluates the seismic performance of steel moment resisting frames (MRFs) upgraded with different structural protective systems. For this, three 5 storey steel MRFs (Ordinary moment frame (OMF), intermediate moment frame (IMF) and special moment frame (SMF)) and two 10 storey MRFs (IMF and SMF) were studied. As structural protecti...

The masonry infill walls influence substantially the response of reinforced concrete (RC) buildings under lateral loading due to their contribution to strength and stiffness. In the literature, there are several approaches for modelling the infill walls. However, they provide different results. In this study, the equivalent diagonal strut model was...

In this study, a comparison and code evaluation for the load carrying capacity (Pu) of recycled aggregate concrete (RAC) filled steel tubular short columns under axial compression are presented. For this, a total of 1600 Pu results were assessed using four different international design codes (Eurocode 4, ACI, AIJ and DL/T). The relations as well a...

The Concrete Filled Steel Tubular (CFST) columns have several benefits in comparison to the ordinary steel or reinforced concrete ones. Therefore, they have become more commonly acknowledged in the structural applications. In this study, two design codes such as American Concrete Institute (ACI) and Eurocode 4 (EC4) were used for predicting the ult...

In this study, the seismic behaviour of the base isolated frames was investigated comparatively through nonlinear time history analysis. For this, two-dimensional five-storey and three-bay steel moment frames equipped with lead rubber bearing (LRB) isolators were used. The force-deformation behaviour of the isolators was modelled by the bi-linear b...

Friction damping devices are relatively inexpensive and effective method for energy dissipation through the mechanism of solid friction generated at the sliding surface. It is crucial to provide a steady and predictable frictional response during the life of these devices. In this study, a numerical analysis was performed in order to investigate th...

This paper presents an analytical study aimed at evaluating the seismic performance of steel moment resisting frames (MRFs) retrofitted with different approaches. For this, 3, 6 and 12 storey MRFs having four equal bays of 5 m were selected as the case study models. The models were designed with lateral stiffness insufficient to satisfy code drift...

Composite columns have superior strength and ductility performance, and they have become more widely accepted in the engineering applications. However, the filled tubular columns require more attention. This study aims to present a new formulation for the axial load carrying capacity (N u ) of circular concrete filled steel tubular (CFST) short col...

Circular hollow section (CHS) steel beams are one of the essential structural members in civil engineering applications. These members are primarily subject to bending. The ratio of the ultimate bending strength over the plastic bending moment is called flexural overstrength factor. This parameter characterizes the flexural behaviour of steel CHS b...

Bond deterioration between the reinforcement and surrounding concrete is one of the crucial reasons for the structural degradation in the steel–concrete composite structures. The assessment of bond deterioration due to corrosion is of prime importance on this issue. This study aims to present the derivation of analytical formulation of ultimate bon...

This paper presents an analytical study aimed at evaluating the effectiveness of using buckling-restrained braces (BRBs) in mitigating the seismic response of a case study 6 storey reinforced concrete (RC) building. In the design of the BRBs with non-prismatic cross-sections, twelve combinations of α and β design parameters that influence the stren...

In this study, an artificial neural network (NN) based explicit formulation for predicting the edge breakout shear capacity of single adhesive anchors post-installed into concrete member was proposed. To this aim, a comprehensive experimental database of 98 specimens tested in shear was used to train and test NN model as well as to assess the accur...

Off-center or gate braced frames are a special configuration of inverted V bracing with non-straight diagonal members that are made of two elements connected to the corner of the frame by another member. This arrangement is characterized by an eccentricity of the intercepted bracing as respect to the straightness of the theoretical working length o...

In recent decades, several passive energy dissipation systems have been conceived in order to minimize the damage in structural and non-structural components of either new or existing buildings. In this study, the use of friction damped tension-compression diagonal braces for seismic upgrading of a steel moment resisting frames is investigated. To...

In this study, nonlinear dynamic analyses were performed in order to evaluate and compare the structural response of different type of moment resisting frame buildings equipped with conventional braces (CBs) and buckling restrained braces (BRBs) subjected to near-field ground motions. For this, the case study frames, namely, ordinary moment-resisti...

This paper presents the results of an analytical study on seismic reliability of viscoelastically damped frame systems in comparison with that of conventional moment resisting frame systems. In order to exhibit the reliability of the frame systems with viscoelastic dampers, seismic reliability analyses were carried out for steel framed buildings, 5...

The flexural behaviour of steel beams significantly affects the structural performance of the steel frame structures. In particular, the flexural overstrength (namely the ratio between the maximum bending moment and the plastic bending strength) that steel beams may experience is the key parameter affecting the seismic design of non-dissipative mem...

Reinforced concrete (RC) is one of the most commonly used composite materials in construction industry. Corrosion of reinforcing steel embedded in concrete is a crucial issue leading deterioration of RC structure. In this study, mathematical formulations that predict the time from corrosion initiation to corrosion cracking in RC elements subjected...

In this study, nonlinear static and dynamic analyses were performed to compare the structural response of different types of moment-resisting frame buildings equipped with concentric diagonal braces under lateral loading. For this purpose, the existing moment-resisting frames designed according to two different stiffness levels were used as case st...

This paper reports the results of an analytical study to predict the edge breakout shear capacity of single adhesive anchors post-installed into uncracked hardened concrete. For this purpose, an experimental database for the adhesive anchors compiled by the ACI Committee 355 was obtained and utilized to construct training and test sets so as to der...

Bu çalışmada, farklı özelliklere sahip moment aktarabilen çerçeve sistemli yapılar ile bunlara sonradan ilave edilen sürtünme sönümleyicili yapıların deprem etkisi altındaki yapısal tepkileri lineer olmayan dinamik analiz kullanılarak karşılaştırmalı olarak incelenmiştir. Bu amaçla, 4 ve 8 katlı moment aktarabilen çerçeveli çelik yapılar araştırmad...

Burkulması önlenmiş çelik çaprazlar gerek yeni, gerekse güçlendirme ihtiyacı olan yapılarda kullanılan bir yapı sistemidir. Geleneksel çelik çaprazlara kıyasla, burkulması önlenmiş çelik çaprazlar deprem etkisi altında çekmeve basınçta benzer yük taşıma kapasitesine sahip olup, dengeli bir histeretik davranış sergilemektedirler. Bu çalışmada, depre...

The present paper investigates the seismic reliability of the application of buckling restrained braces (BRBs) for seismic retrofitting of steel moment resisting framed buildings through fragility analysis. Samples of regular three-storey and eight-storey steel moment resisting frames were designed with lateral stiffness insufficient to comply with...